An anti-interference intelligent ignition device

Abstract

The application discloses an anti-interference intelligent ignition device, which comprises an ignition rod, a high-voltage wire channel is arranged in the ignition rod and is used for connecting an external high-voltage power supply, a high-voltage electric arc ignition type ignition electric nozzle is fixedly installed at the front end of the ignition rod through screw threads, the ignition electric nozzle can generate a high-voltage electric arc, the ignition end of the ignition electric nozzle faces the air outlet end of an anti-interference head, the anti-interference head comprises a cylinder one which is rotatably installed at the front end of the ignition rod, the rear end of the cylinder one is provided with a cylinder two through screw threads, the front end of the cylinder two is designed in a trumpet-shaped flared manner, through the flow guide block one, the flow guide block two and the air channel structure in the anti-interference head, the oil gas can be branched, compressed and backflow-impacted, so that the oil gas flow rate is reduced and the local concentration is improved, the anti-interference head with an adjustable matching angle can accurately aim at the oil gas nozzle, the problem that a high-speed airflow blows out a flame is solved, and the oil gas can be quickly ignited without long-time and multiple ignitions.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of boiler ignition technology, in particular to an anti-interference intelligent ignition device. BACKGROUND

[0002] The boiler of a power plant is the core equipment of thermal power generation, which generates high-temperature and high-pressure steam by burning coal powder to drive the steam turbine to generate electricity. The coal powder is ignited first by the ignition device to generate a high-voltage arc, ignites the sprayed oil gas (such as diesel atomized gas), forms a stable flame, and then ignites a large amount of coal powder through the flame to complete the start-up and continuous combustion of the boiler.

[0003] However, in order to ensure that the oil gas can quickly cover the coal powder area, the oil gas nozzle usually has a high jet flow rate. The high-speed airflow will form a strong wind field, which will easily blow out the initial small flame generated by the ignition device. The existing technology usually uses a long-time and multiple ignition method, that is, the ignition device continuously generates an arc until the oil gas is successfully ignited. However, continuous ignition or multiple ignition will cause the electrode of the ignition electrode to be easily oxidized and ablated, thereby shortening the service life. SUMMARY

[0004] The present application provides an anti-interference intelligent ignition device, which realizes the shunting, compression, and backflow impact of oil gas through the guide block one, guide block two, and air duct structure inside the anti-interference head, thereby reducing the oil gas flow rate and improving the local concentration. The anti-interference head with adjustable angle can accurately aim at the oil gas nozzle, solve the problem of blowing out the flame by high-speed airflow, and quickly ignite the oil gas without long-time and multiple ignition.

[0005] To achieve the above-mentioned purpose, the anti-interference intelligent ignition device comprises an ignition rod, a high-voltage wire channel is arranged inside the ignition rod for connecting an external high-voltage power supply, a high-voltage arc ignition type ignition electrode is fixedly installed at the front end of the ignition rod through threads, the ignition electrode can generate a high-voltage arc, and the ignition end of the ignition electrode faces the gas outlet end of the anti-interference head.

[0006] The anti-interference head comprises a cylinder one rotatably installed at the front end of the ignition rod, a cylinder two is threadedly installed at the rear end of the cylinder one, the front end of the cylinder two is designed as a flared opening for facilitating the rapid entry of oil gas, a guide block one is screw-bolted inside the cylinder one, and a guide block two is screw-bolted inside the cylinder two.

[0007] The second flow guide block is located at the center of the second cylinder body, separates the inner part of the anti-interference head into two independent air passages, namely air passage one and air passage two, the end of the air passage one is provided with a narrow air passage, the narrow air passage is located at the end of the first flow guide block close to the second flow guide block, and oil gas compression is realized through passage contraction, the gap between the first flow guide block and the first cylinder body is conical, the front end inner diameter of the conical gap is consistent with the width of the narrow air passage, the rear end inner diameter is consistent with the inner diameter of the first cylinder body, and the rear end is provided with an expanding opening, so that space is provided for oil gas pressure reduction and speed reduction.

[0008] The first flow guide block and the second flow guide block are spaced apart from each other, and the return air passage is provided between the first flow guide block and the second flow guide block, the air inlet end of the return air passage is communicated with the air outlet end of the air passage two, and the air outlet end of the return air passage is located on the upper side of the narrow air passage, so that the backflow of oil gas can fully collide with the oil gas discharged from the narrow air passage.

[0009] Reference Figures 5-6 The oil gas flow direction indicated by the dashed line is shown, after the oil gas enters the second cylinder body, under the blocking action of the second flow guide block, the oil gas is evenly divided into two parts, one part of the oil gas enters the air passage one, and the other part of the oil gas enters the air passage two, the oil gas in the air passage one flows forward along the passage, when passing through the narrow air passage, the oil gas is quickly compressed due to the sudden contraction of the passage cross section, the pressure is increased, and the flow rate is temporarily increased, when the oil gas passes through the narrow air passage, it instantaneously enters the conical cavity between the first flow guide block and the first cylinder body, the cavity volume suddenly expands, the oil gas pressure rapidly decreases, and the flow rate greatly decreases, thereby realizing the preliminary speed reduction of the oil gas.

[0010] At the same time, the oil gas in the air passage two flows forward along the passage, enters the air inlet end of the return air passage, flows upward along the arc-shaped pipeline, and is discharged downward from the air outlet end on the upper side of the narrow air passage, collides with the oil gas discharged from the narrow air passage, and the two streams of oil gas interact with each other, further consume kinetic energy, and realize secondary speed reduction.

[0011] In addition, after the collision of the two streams of oil gas, the oil gas is mixed with each other, a local oil gas accumulation area is formed at the air outlet end of the anti-interference head, the oil gas concentration is improved, the low-speed and high-concentration oil gas mixture is more easily ignited by the high-pressure arc generated by the ignition electrode, and the problem that the initial flame is blown out by the high-speed airflow is avoided.

[0012] Compared with the prior art, the beneficial effects of the present application are:

[0013] By arranging the second flow guide block, the air passage one, the air passage two, the narrow air passage and the return air passage in the anti-interference head, during use, the second flow guide block divides the oil gas into two streams, the oil gas in the air passage one is compressed through the narrow air passage and then enters the conical cavity for pressure reduction and speed reduction, the oil gas in the air passage two is backflowed through the return air passage and collides with the former for secondary speed reduction, and finally the flow rate of the oil gas is reduced, at the same time, the collision and mixing of the two streams of oil gas form a local high-concentration area, realizing the effects of speed reduction and concentration improvement, solving the problem that the high-speed airflow blows out the flame, without the need for long-time and multiple ignition, reducing energy consumption and reducing the wear of the ignition electrode. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The overall structure of the present application is shown in the figure;

[0015] Figure 2 The explosive structure of the present application is shown in the figure;

[0016] Figure 3 The Figure 2 The enlarged structure of A in the figure is shown in the figure;

[0017] Figure 4 The explosive structure of the anti-interference head in the present application is shown in the figure;

[0018] Figure 5 The oil and gas flow in the use of the present application is shown in the figure;

[0019] Figure 6 The Figure 5 The enlarged structure of B in the figure is shown in the figure;

[0020] Figure 7 The structure of the anti-interference head in the present application when rotating is shown in the figure;

[0021] Figure 8 The structure of the anti-interference head in the present application when tilting is locked is shown in the figure;

[0022] Figure 9 The structure of the anti-interference head in the present application when parallel is locked is shown in the figure;

[0023] Figure 10 The connection structure of the rotating sleeve and the push rod in the present application is shown in the figure.

[0024] The meanings of the various labels in the figure are as follows:

[0025] 1, ignition rod; 11, ignition electrode; 2, anti-interference head; 21, cylinder one; 22, cylinder two; 23, flow guide block one; 24, flow guide block two; 25, air passage one; 26, air passage two; 27, narrow air passage; 28, backflow air passage; 3, rotating shaft; 31, cylinder; 311, clamping groove one; 312, clamping groove two; 4, ear plate; 5, push rod; 51, connecting ball; 6, rotating sleeve; 61, annular groove. DETAILED DESCRIPTION

[0026] The technical solutions in the present application will be described clearly and completely below in combination with the figures in the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0027] Because the existing ignition device of the power plant boiler is easy to be blown out by the airflow when the oil gas is high-speed injected, it needs long time and multiple ignition, which results in high energy consumption, fast component wear, low starting efficiency and safety hazards.

[0028] Therefore, in view of the above problems, the present application shows an anti-interference intelligent ignition device, referring to Figures 1-3 As shown, it comprises an ignition rod 1, a high-voltage wire channel is arranged inside the ignition rod 1 for connecting an external high-voltage power supply, a high-pressure electric arc ignition type ignition electrode 11 is fixedly installed at the front end of the ignition rod 1 through threads, the ignition electrode 11 can generate a high-voltage electric arc, the ignition end of the ignition electrode 11 faces the gas outlet end of the anti-interference head 2, a rotating shaft 3 is fixedly installed at the rear end of the anti-interference head 2 through welding, two symmetrical ear plates 4 are welded at the front end of the ignition rod 1, and the rotating shaft 3 is rotatably installed inside the ear plate 4.

[0029] In use, an operator holds the rear end of the ignition rod 1, inserts the front end of the ignition rod 1 into the boiler cavity, and then rotates the anti-interference head 2 around the rotating shaft 3 to make the ignition rod 1 assume an inclined posture, so that the gas inlet end of the ignition rod 1 precisely faces the direction of the oil gas nozzle, the oil gas sprayed by the oil gas nozzle is conically diffused outward, the oil gas near the side of the ignition rod 1 can smoothly enter the inside of the anti-interference head 2, and the flow rate is reduced and the concentration is increased through the internal structure of the anti-interference head 2, so that the strong oil gas flow rate interference on the ignition process is avoided.

[0030] Then the structure of the anti-interference head 2 is disclosed in detail, referring to Figure 4 As shown, the anti-interference head 2 comprises a cylinder one 21 rotatably installed at the front end of the ignition rod 1, a cylinder two 22 is threadedly installed at the rear end of the cylinder one 21, the front end of the cylinder two 22 is designed as a flared opening for facilitating the rapid entry of oil gas, a flow guide block one 23 is boltedly installed inside the cylinder one 21, and a flow guide block two 24 is boltedly installed inside the cylinder two 22.

[0031] Specifically, referring to Figure 5 As shown, when the ignition rod 1 is located inside the cavity, the cylinder two 22 is made to have its flared gas inlet end opposite to the oil gas nozzle through the rotation of the cylinder one 21 around the rotating shaft 3, and the oil gas sprayed by the oil gas nozzle is conically diffused outward, wherein the oil gas near the side of the ignition rod 1 rapidly enters the inside of the cylinder two 22 under the action of the airflow diffusion pressure.

[0032] The second flow guide block 24 is located at the center of the second cylinder 22, separates the inside of the anti-interference head 2 into two independent air passages, the first air passage 25 and the second air passage 26, and the end of the first air passage 25 is provided with a narrow air passage 27, which is located at one end of the first flow guide block 23 close to the second flow guide block 24, and the oil and gas is compressed through the passage contraction. The gap between the first flow guide block 23 and the first cylinder 21 is conical, the front end inner diameter of the conical gap is consistent with the width of the narrow air passage 27, and the rear end inner diameter is consistent with the inner diameter of the first cylinder 21, which is set as an expanding mouth to provide space for the oil and gas to reduce pressure and speed.

[0033] The first flow guide block 23 and the second flow guide block 24 are spaced apart by a backflow air passage 28, the air inlet end of the backflow air passage 28 is communicated with the air outlet end of the second air passage 26, and the air outlet end of the backflow air passage 28 is located on the upper side of the narrow air passage 27, which ensures that the backflow oil and gas can fully collide with the oil and gas discharged from the narrow air passage 27.

[0034] Reference Figures 5-6 As shown by the oil and gas flow direction represented by the dashed line, after the oil and gas enters the second cylinder 22, it is evenly divided into two parts under the blocking action of the second flow guide block 24, one part of the oil and gas enters the first air passage 25, and the other part of the oil and gas enters the second air passage 26. The oil and gas in the first air passage 25 flows forward along the passage, and when it passes through the narrow air passage 27, the oil and gas is quickly compressed due to the sudden contraction of the passage cross section, the pressure is increased, and the flow rate is temporarily increased. When the oil and gas passes through the narrow air passage 27, it instantly enters the conical cavity between the first flow guide block 23 and the first cylinder 21, the cavity volume suddenly expands, the oil and gas pressure rapidly decreases, and the flow rate greatly decreases, realizing the preliminary speed reduction of the oil and gas.

[0035] At the same time, the oil and gas in the second air passage 26 flows forward along the passage, enters the air inlet end of the backflow air passage 28, flows upward along the arc-shaped pipeline, and is discharged downward from the air outlet end on the upper side of the narrow air passage 27, collides with the oil and gas discharged from the narrow air passage 27, and the two streams of oil and gas interact with each other, further consuming kinetic energy, and realizing secondary speed reduction.

[0036] In addition, the two streams of oil and gas mix with each other after colliding, forming a local oil and gas accumulation area at the air outlet end of the anti-interference head 2, improving the oil and gas concentration, and the low-speed, high-concentration oil and gas mixture is more easily ignited by the high-pressure arc generated by the ignition electrode 11, avoiding the problem that the initial flame is blown out by the high-speed airflow.

[0037] In order to ensure that the angle of the anti-interference head 2 will not be offset due to airflow impact when the oil and gas nozzle sprays oil and gas, as shown in Figures 7-8 The outer wall of the rotating shaft 3 is fixedly connected with a cylinder 31, the inside of the ignition rod 1 is provided with a sliding groove, the inside of the sliding groove is slidably installed with a push rod 5, the outer wall of the cylinder 31 is provided with a clamping groove one 311, which is a V-shaped groove and is matched with the front end of the push rod 5.

[0038] In use, the ignition rod 1 and the anti-interference head 2 are inserted into the furnace cavity together, the anti-interference head 2 rotates around the rotating shaft 3 under the action of gravity, at this time the operator rotates the rotating sleeve 6 at the rear end to push the push rod 5 to move forward along the sliding groove, the front end of the push rod 5 is tightly fitted with the V-shaped inner wall of the first clamping groove 311, through the axial pressure of the push rod 5 and the lateral constraint force of the V-shaped groove, the cylinder 31 is firmly fixed, and then the first cylinder 21 is locked at a specified angle, preventing the airflow impact during oil and gas injection from causing the anti-interference head 2 to deviate from the angle, and ensuring that the oil and gas can stably enter the inside of the anti-interference head 2.

[0039] In order to facilitate the carrying and storage of the device when not in use, and to avoid damage caused by collision due to the protrusion of the anti-interference head 2, as shown in Figure 9 , the outer wall of the cylinder 31 is provided with a second clamping groove 312, which is also a V-shaped groove, and the second clamping groove 312 is located at the upper end of the first clamping groove 311. When storing, the operator reversely rotates the rotating sleeve 6 to pull the push rod 5 backward, and then manually rotates the anti-interference head 2 to make it rotate around the rotating shaft 3 to be horizontal with the ignition rod 1, and then rotates the rotating sleeve 6 forward to push the push rod 5 forward to insert into the second clamping groove 312, realizing the horizontal locking of the anti-interference head 2. At this time, the ignition rod 1 and the anti-interference head 2 are in the same straight line, which is convenient for handheld carrying or storage in the tool box.

[0040] The driving structure of the push rod 5 is disclosed below, as shown in Figure 10 , the rear end of the outer wall of the ignition rod 1 is provided with a rotating sleeve 6 through screw connection, the front end of the rotating sleeve 6 is provided with an annular groove 61, the cross section of the annular groove 61 is circular, the rear end of the push rod 5 is fixedly connected with a connecting ball 51 through welding, and the connecting ball 51 is movably installed in the inside of the annular groove 61. The circular annular groove 61 can limit the axial movement of the connecting ball 51 to avoid its disengagement from the annular groove 61.

[0041] In use, the operator holds the outer wall of the rotating sleeve 6 and rotates the rotating sleeve 6. Since the rotating sleeve 6 is connected with the ignition rod 1 through screw connection, the rotating motion is converted into axial forward movement, the annular groove 61 moves forward synchronously, and the push rod 5 is pushed forward along the sliding groove by the connecting ball 51 to realize the extension of the push rod 5.

[0042] Working principle: in use, the ignition rod 1 is inserted into the furnace cavity, the anti-interference head 2 sags under gravity, and the rotating sleeve 6 is rotated to push the push rod 5 to lock the angle.

[0043] The oil and gas sprayed by the gas nozzle enters the anti-interference head 2, is divided into the first gas channel 25 and the second gas channel 26 through the flow guide block 24, the oil and gas in the first gas channel 25 is compressed through the narrow gas channel 27, then is reduced in speed in the conical cavity, and the oil and gas in the second gas channel 26 is backflowed through the backflow gas channel 28 to impact the former, is reduced in speed for the second time and is improved in concentration.

[0044] Ignition electrode 11 generates high-voltage arc, ignites low-speed high-concentration oil gas, forms stable flame to ignite pulverized coal; after use, unlock anti-interference head 2 and rotate to horizontal locking, which is convenient for storage and carrying.

[0045] The above shows and describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only preferred examples of the present application and are not intended to limit the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.

Claims

1. An anti-interference intelligent ignition device, comprising an ignition rod (1), characterized in that: An ignition nozzle (11) is fixedly installed at the front end of the ignition rod (1), and an anti-interference head (2) is rotatably installed at the front end of the ignition rod (1). The anti-interference head (2) includes a cylinder one (21) rotatably installed at the front end of the ignition rod (1). A cylinder two (22) is threadedly installed at the rear end of the cylinder one (21). A guide block one (23) is installed inside the cylinder one (21) by bolts. A guide block two (24) is installed inside the cylinder two (22). When ignited, the oil and gas enter the cylinder two (22), and after passing through the guide block one (23) and the guide block two (24), the flow rate is reduced, and then it is sprayed toward the ignition nozzle (11). The second guide block (24) is located at the center of the second cylinder (22). The anti-interference head (2) is divided into an air passage (25) and an air passage (26). A narrow air passage (27) is provided at the end of the first air passage (25). The narrow air passage (27) is located at the end of the first guide block (23) near the second guide block (24). A conical gap is formed between the first guide block (23) and the first cylinder (21). The gap between the first guide block (23) and the second guide block (24) is a return air passage (28). The air inlet of the return air passage (28) is connected to the air outlet of the second air passage (26). The air outlet of the return air passage (28) is located on the upper side of the narrow air passage (27). The conical gap between the guide block (23) and the cylinder (21) is flared towards the outlet end of the cylinder (21).

2. The anti-interference intelligent ignition device according to claim 1, characterized in that: The anti-interference head (2) has a rotating shaft (3) fixedly installed at its rear end, and the ignition rod (1) has an ear plate (4) fixedly installed at its front end. The rotating shaft (3) is rotatably installed inside the ear plate (4).

3. The anti-interference intelligent ignition device according to claim 2, characterized in that: A cylinder (31) is fixedly connected to the outer wall of the rotating shaft (3). A sliding groove is provided inside the ignition rod (1). A push rod (5) is slidably installed inside the sliding groove. A slot (311) is provided on the outer wall of the cylinder (31). The front end of the push rod (5) can fit against the inner wall of the slot (311).

4. The anti-interference intelligent ignition device according to claim 3, characterized in that: The outer wall of the cylinder (31) is provided with a second slot (312), which is located at the upper end of the first slot (311).

5. The anti-interference intelligent ignition device according to claim 3, characterized in that: The outer wall of the ignition rod (1) is threaded with a rotating sleeve (6) at the rear end. The front end of the rotating sleeve (6) is provided with an annular groove (61). The rear end of the push rod (5) is fixedly connected with a connecting ball (51). The connecting ball (51) is movably installed inside the annular groove (61).

6. The anti-interference intelligent ignition device according to claim 5, characterized in that: The annular groove (61) has a circular cross-section, and the connecting ball (51) is snapped into the annular groove (61).

7. The anti-interference intelligent ignition device according to claim 1, characterized in that: The ignition end of the ignition nozzle (11) is positioned facing the outlet end of the anti-interference head (2) and is located to the side of the outlet end of the anti-interference head (2).

Images